Product manual

Barracuda 9 Product Manual, Rev. C 63
Table 13: Single-ended signal/contact assignments for ST19171N drives
*CAUTION: Connector contact 25 must not be connected to ground at the host end or the drive end of the
cable. If the I/O cable should accidentally be plugged in upside down, terminator power on pin 26
will be shorted to ground.
Notes [ ]: See page following Table 17.
Signal
name [1]
Connector
contact
number [11]
Cable
conductor
number [12]
Connector
contact
number [11]
Signal
name [1]
GND 1 1 2 2 –DB0
GND 3 3 4 4 –DB1
GND 5 5 6 6 –DB2
GND 7 7 8 8 –DB3
GND 9 9 10 10 –DB4
GND 11 11 12 12 –DB5
GND 13 13 14 14 –DB6
GND 15 15 16 16 –DB7
GND 17 17 18 18 –DBP
GND 19 19 20 20 GND
GND 21 21 22 22 GND
GND 23 23 24 24 GND
NC [10] 25* 25 26 26 TERMPWR
GND 27 27 28 28 GND
GND 29 29 30 30 GND
GND 31 31 32 32 –ATN
GND 33 33 34 34 GND
GND 35 35 36 36 –BSY
GND 37 37 38 38 –ACK
GND 39 39 40 40 –RST
GND 41 41 42 42 –MSG
GND 43 43 44 44 –SEL
GND 45 45 46 46 –C/D
GND 47 47 48 48 –REQ
GND 49 49 50 50 –I/O